What were Eli whitneys two major contributions to industry?

Answer 1

Eli Whitney was one of the pioneers in the industrial revolution. His invention of the cotton gin. In one demonstration of his new machine he turned out in one hour what it took a full day's work of several workers to do. The machine made harvesting cotton a mechanical process rather than doing it by hand. He also invented the first milling machine worthy of the name. It had the innovation of using a multiple edged cutting wheel and a movable work bed driven by worm gear and screw thread. This helped manufacturing various metal products.